Carpet sweeper



July 2 1940- I J. P. REDIFEARN 2,206,429

CARPET SWEEPER July 2, 1940.

J. P. REDFEARN CARPET SWEEPER Filed OCb. 2l, 1936 4 Sheets-Sheet 2 L!INVENTOR July 2, 1940.

J. P. REDFEARN y CARPET SWEEPER Filed Oct. 2l, 1936 4 Sheets-Sheet 3AKZ/j n0 3 mvENToR July 2, 1940- J. P. REDFEAN 2,206,429

` CARPET SWEEPER Filed oct. 21, 1956 4 sheets-sheet 4 di I Patented July2, 1940 UNETED STATES PATENT OFFICE CARPET sWE'EI-En John PercyRedfearn, Accrington, England', as-

signor to Entwisle & Kenyon Limitedg'Accrington, Lancaster, England y yApplication October 21, 1936,4Serialvl\lo. 106,835 n In Great BritainMay. 7, 1936 1 claim.

'Ihis invention relates to improvements in carpet sweepers of the typehaving a central brush with a pan or receptacle on each side thereof toreceive the dust and litter swept up by the brush and adapted to beinserted andremovedthrough apertures in the top of the casing, thelatter of the sweeper being mounted on four wheels which engage pulleyson the brush shaft for the purpose of rotating the brush. A

In carpet sweepers of this type the dust pans or receptacles are usuallymounted on pivots near the brush about which they can be rotated todischarge the dust and other litter collected therein and althoughsweepers with such ypans or receptacles are in general use they have thedisadvantage that the pans or receptacles cannot be completely removedfrom the casing of the sweeper for emptying their contents andl moreovertheir capacity for holding dust and litter is small.

The object of the invention is an improved construction of dustreceptacle to facilitate its insertion into and removalV from the casingand the collection of dust and litter therein.

The invention will be described with reference to the accompanyingdrawings in which two modications of the invention are shown, Figs. 1 to5 illustrate the invention as applied to a carpet sweeper of theconstruction having two longitudinal axles extending from end to end ofthe casing on which the supporting y wheels are mounted and Figs. 6 to10 illustrate the invention as applied to a carpet sweeper of theconstruction in which each wheel is mounted separately on a stub axle.In these drawings- Fig. 1 is a horizontal section of a sweeper embodyingthe rst form of the invention the section being taken on line l-I Fig.'2.

Fig. 2 is a transverse section on line 2-2 of Fig. 1.

Fig. 3 is a plan of the sweeper with one of the dust receptaclesremoved.

Fig. 4 is a perspective view of one of the dust receptacles.

Fig. 5 is a detail view of one end of a dust re ceptacle showing thespring retaining means for holding it securely in the casing.

Fig. 6 is a horizontal section of a sweeper embodying the second form ofthe sweeper, the section being taken on line 6-6 Vof Fig. 7.

Fig. 7 is a transverse section on line I-'lof Fig. 6.

Fig. 8 is a plan of the sweeper.

Fig. 9 is a perspective View of one of the dust receptacles, and

Fig. is a, detail view of one end of a dust receptacle showing thespring retaining means for holding it securelyV in the casing.

Thegsweeper shown in Figs. 1 to 5 is constructed with a casing A',ybrush B and supporting ,25 wheels C mounted on the ends of thelongitudinal axles Cl and engaging pulleys b` on. the end of the shaftof thebrush B in the usual Way. A

rThe casing Ais formed with two openings or apertures` A1 in the topthereof of substantially the length of the casing through each of whicha separate dust receptacle D can be insertedrin't'o and 'removed fromthe casing. Ea'ch'dust receptacle D'is of a size and shape as to ll thespace in the casing between the brush B andthe outer wall a and toextend the Awhole of the length of the ,casingr and the receptaclesv arepreferably alike andy interchangeable.4 The wall d of the receptacle Dwhich abuts against the outer wall a ofthe casing corresponds in shapetherewith and' extends upwards to the top or cover D1 of the receptacle.'The inner Wall d1 which is adjacent to the brush B is shaped as shownin Figs. 2 and 4 so that it is further away fromV the brush B at thebottom than at the top thereby forming a hopper like path for the dustand litter as they are nung off the brush. The Wall d extends upwardsfor some distance beyondthe central longitudinal axis of the brush B andan opening cZ2 is formed'betwe'en the topedge of the wall d1' and theunderside' of the lid or cover D1v ofthe receptacle. j l One end .d3ofthe receptacle is open whilst the other en'd d4` is closed and'carriesv a spring' e which engages a projection a1 on the end WallV of,`the casing A When the receptacle is vinserted into thelatter. The springe causes a joint to be maintained between theend of the receptacle andthe inside of the endof the casing thereby preventingescapeofre'fusefrom the receptacle.` n f 1f' it is desired botnends ofthe receptacle may f4 be open the retaining spring e being affixed tothe end of either the outer wall d 'or the inner walld1. A f

The cover D1 'is arranged at such an angle to the bottom dfof thereceptacle as. to coincide with the inclinationrof. the top of thesweeper casing andit extends beyond the edges of the ends ofj'fthereceptacle D' whereby when the latter, is `inserted into the casingA the.edges of the cover will rest on the edges ofl the casingandthe apertureA1 and completely close' it. The cover D1 is provided with a handle d6by which` it caribe lifted out through the topof" the casing.

Approximately vertical guides a2 are preferpreferably alike andinterchangeable.

the dust and litter entering the receptacle, the

latter is formed with a second wall d'1 arranged in front of the curvedwall d1 with a deep groove d8 open at the bottom between them. When thereceptacle D is inserted into the casing this groove fits over the axleCluand prevents the dust y and litter entering the receptacle fromcoming into contact therewith.

The sweeper shown in Figs. 6 to 10 is constructed with a casing A, brushB and supporting; .r

wheels CY each wheel C being mounted on a 'separatestub-axle' C2 carriedby springs or in any other suitableway'at the end of the casing A. Apair of wheels C at each end of the casing'engage a friction'pulley b`on the shaft of the brush B-in'the usual way.

f-The" casing 'A'is formed with two openings or apertures A1 in the .topthereof of substantially :the "length of the casing through each ofwhich a'.'se`parate dust receptacle D can be inserted into andremoved`from 'the casing. Each dust receptacle D is ofv a size and shape as toll the 'spacefin the casingbetween the brush B and Ythe outenwall a andto extend the whole of the length of the casing and the receptacles areThe wall A4dl'fof'the" receptacle D which vabuts against the outer'walla' of the casing correspondsin shape therewith 'and extends upwards tothe top or 'cover D1` of Ithe'receptacle. The inner wall d1 which isadjacent to the brush B is shaped as shown inFigs. 'l` and 9 so thatitis further away fromthe'lbrush B at the bottom than at the top therebyforming a hopper-like path for the dust fand'litter as they are flung01T the brush. The walld1 extends upwards for some distance beyond thecentral longitudinal axis of the brush `B and an opening d2 is formedbetween the top edge of the curved Vwall d1 and the underside of the lidor 'cover D1 ofthe receptacle. One end d?" of thereceptacle is openwhilst the other end d4 is closed and carries a spring e which engagesya projection 'a1 in the end wall of :the casing A'when the receptacleisinserted into ,the latter. The spring e causes a joint to be made'between the end of the receptacle and the yinside of the 'end of the'casing thereby prevent- ,ing escape of refuse from the receptacle.,jfThe'jcover D1 is arranged at such an angle to the bottomd5 of thereceptacle as to coincide 'with the inclination of the top of thesweeper vcasing `andlit extends beyond the top edges of 'the receptacleD whereby when the latter is 'inserted into the casing A the edges ofthe cover ,will 4rest on the edges of the casing around the aperture A1and` completely close it. The cover 'HD1 'isprovided with a handle d6 bywhich it can be lifted out through the top Yof the casing.

iipproxim'ately vertical guides a2 are preferably provided at each endof the jcasing A to guide the', receptacle D linto and out of the casingand prevent ylateral'movement when it has been'inserted therein. 4

In this construction Where each wheel C is mounted on a separate stubaxle C2 and there is no wheel axle extending from end to end oi thecasing it is not necessary to provide the dust receptacle D with -asecond wall such as the wall :Z7 shown in the form of .the inventionillustrated in Figs. 1 to 5.

The operation of the sweeper is the same in b oth forms of theinvention. When the sweeper is being propelled in the direction of thearrow Fand the brush B is consequently rotating in "the direction' ofthe arrow F1 the dust and litter is carried up by the brush B over thetop thereof and discharged into the rear receptacle D. The

, travel of the dust and litter is assisted by the vcurvature of thewalld1 of the receptacle, which is some distance from the brush at thebottom Y "and nearly incontact therewith at the top, giv- `:ing 'ahopper-like Apath to the dust and litter which are flung off the brushabove the top of the wall d1 in a tangential direction against the toplofthe vcasing and directed thereby into the rear'receptacle through theopening d2 above the curved wall d1 thereof.

When the sweeper is propelled in the opposite 'direction to the arrow Fthe other receptacle D becomes' the rear receptacle and the dust andlitter is discharged thereinto over the top of the brush.

` l To empty the receptacles D it is only necessary to withdraw themupwards through the apertures A1 in the top of the casing A anddischarge their contents through the open end d3 into any suitablereceiver and to replace them in to then'casing. l

"What Ifclaim as my invention and desire to protect by Letters Patentis:

In a carpet sweeper of the type having -a vcasing, supporting wheels, acentral brush and two dust receptacles one at each side of the centralbrush, a dust receptacle adapted to be inserted land removed through anaperture in the top of `the casing'comprising in combination a base, anouter wall adjacent to an outer wal-l of the casing, a curved inner walladjacent tothe brush extending upward from the base beyond the centrallongitudinal axis oi the brush, a wall spaced b'etweenthe inner wall andthe outer Wall to form a deep 'groove in the underside of thereceptaclel into which the longitudinal axle carrying the'wheelsisreceived and by which it is protected when the receptacle, is in use, aclosed VWall, at one endrofthe receptacle, a second wall at' the`opposite end of the receptacle maintained in 'dusttight engagement withthe corresponding end of the casing and having an aperture therein for.the discharge of dust and litter, said end walls extending above thetop of the inner wall, spring means between the closed end wall of thereceptacle and the corresponding end of the casing maintaining -the dusttight engagement oi lthe open en'dof the'receptacle with .thecorrespondingend of the casing, and a lcover attached to the outer walland the end walls thereby leaving. an` aperture between the top of theinner ,wall `and the 'cover .throughwhich dust and litter can enter thereceptacle, said spring means comprising a bowed spring aftixed at oneend to the outer surface of an end of the receptacle to engagea;-projectionlon the inside of the casin to retainthe receptacleinposition therein.

PERCY REDFEARN.

